Textile bobbin



Sept. 19, 1 933. c. BERAN 1,927,386

wannasoaam Filed Aug. 20, 1930 INVENTOR Charles F Baron Patented Sept. 19, 1933 1,9z1,3ss

TEXTILE BOBBIN Charles F. Tuckahoe, N. 1., llflgnol' to Celanese Corporation of America, 8 o p raftionoi'Delaware Application Aunt 20, 19:0. Serial No. 416,432, 6 Claims. (01. 242 423) This invention relates to improvements in spools, bobbins and the like particularly to bobbins, spools, etc. which are used in textile operations.

Heretofore bobbins have been manufactured with the bobbin flanges at right angles to the.

barrel. This type of flange was easily bent and distorted in handling, such distortion making it necessary to discard the bobbins after a short period of use. This defect was sought to be overcome by constructing the bobbin with curved flanges and this change resulted in a marked increase in the life of the bobbin. There still remained the objectionable feature of the yarn wedgingthat is, being caught in or forced into the gap or crack between the end of the barrel and the inside of the flange. This defect was remedied by forming the flanges with an annular depression into which the ends of the barrel fitted. An additional improvement to increase the rigidity of the bobbin and to further reduce the possibility of wedging was proposed.

This consisted in providing the flange with a series of inwardly extending projections which were embedded in the barrel. While this resulted in a rigid structure and reduced the possibility of the yarn wedging between .the barrel and the flange, it gave rise to other difliculties. It deformed the edges of the barrel by causing the cardboard or paper of the barrel to bunch up and wrinkle where the finger was forced into the cardboard or fibre. That is, little ridges were formed in each end of the barrel whenever a flnger of the flange was embedded in the barrel. This not only resulted in the yarn being permanently deformed in a similar manner when wound over these ridges and kept so for a long period of time, but also gave rise to wedging between these ridges and the inner walls of the flanges.

An object of this invention is to provide a bobbin which will overcome the defects above pointed out.

Another object of this invention is to produce a bobbin having such rigidity and strength that it can be used repeatedly.

Another object of this invention is to produce a bobbin in which there is no possibility of the yarn becoming wedged at any point. Other objects and advantages will appear from the following detailed description.

In the accompanying drawing illustrating this invention, Figure 1 is a perspective view of my improved bobbin.

Figure 2 is a vertical section through the center of the bobbin taken on the plane indicated by the line 2-2 of Figure 1.

Figure 3 is an enlarged detail sectional view of the bobbin showing the tapered end of the barrel and its union-with the flange.

Like reference numerals designate similar. parts throughout the specification and drawing.

In the drawing the bobbin is represented by 5 and consists of flanges 6, 6 mounted on a core or barrel 7 upon which the barrel the yarn is wound. Within the barrel 7 is a central core or tube 8. ThlS tube 8 is of a length slightly greater than the distance between the two flanges at the portion where the tube contacts with the flanges and 1s crimped over the edges of the central opening m of the flanges as at 10. This serves to maintain the flanges in a rigid and fixed position and maintains the flanges in close contact with the ends of the barrel "I. I This central tube 8 also serves asthe receiver for the spindle when the yarn is being wound on or unwound from the bobbin.

The flanges 6, 6 are formed with their circumferential edges curved outwardly as shown at 9. This serves to strengthen the flanges to such a degree that even when a full bobbin is dropped, the flanges will not be bent or distorted sufficiently to render the bobbin useless. It also necessarily renders the bobbin moreresistant to distortion in transit and in the various winding operations.

The flanges a, s of the improved bobbin may be made of pressed tin plate or sheet steel or of any other suitable metal. The flanges may be stamped out with the curvature desired or may be spun into the desired shape. The central core or tube 8 may be made of any metal which has the requisite strength and rigidity to bind and hold together the various parts of the bobbin.

In order to retain the barrel '7 in proper relationship with respect to the flanges 6, 6 and to the possibility of a gap arising between the two, the inner faces of the flanges are formed with annular depressions 11 into which the ends 12 of the barrel are fitted. The barrel is of such length that the binding eiIect of the tube or core 8 will cause the ends 12 of the barrel 7 to posi tively and rigidly contact with the trough of the annular depression 11.

In order to secure a more permanent and rigid relation between the flanges and the barrel, the former are each provided with a series of projections 13 on their inner walls. These projections are stamped out of the metal of the flanges in such a manner as to be embedded in the outer sln'face of the paper or fibre of the barrel 7. The bobbin in the drawing is shown with six such projections but any number may be provided. Bobbins whose flanges were formed with four or eight such projections were also found to be satisfactory.

5 In order to prevent any bunching up or bulg- 'ingof the paper or flbre of the barrel when the projections are embedded therein, the ends 12 of the barrel are formed with a tapered outer surface as shown atl4. This results in a smooth joint between each projection and the surface of the barrel since there is no excess of material to bulge out to form the objectionable ridges. This is due to the fact that the projections, when the bobbin is assembled, do not contact with the tapered surface of the barrel until close to the horizontal surface of the barrel. This insures a rigid and secure contact without an excess of the paper or flbre or other material to form an objectionable ridge or bulge. The surface of the barrel from flange to flange is therefore perfectly level and smooth, making it possible to and the barrel sm'face.

The projections 13 are stamped out in such a manner that they protrude inwardly to a small degree from the vertical plane formed by the inner walls of the flanges. on the bobbin is thus in contact with a vertical portion of the flange throughout its height and avoids all possibility of the yarn along the edges slipping or sloughing off and creating soft spots in the yarn body.

Another advantage arising from theuse of my invention is the fact that it makes it possible to use harder materials to make the barrel of the bobbin. The use of hard material for producing bobbin barrels is impossible with the old type of bobbin because the harder the material the more pronounced is the deformation of the barrel surface due to the compression or pushing up of the material by the projections when the same are embedded therein. However, by tapering the ends of the barrel it is practicable to use these harder-materials for the bobbin barrel. This is very desirable since harder barrels obviate the danger of the bobbin barrel collapsing when the yarn is tightly wound thereon.

My improved bobbin will thus be seen to overcome all of the objections which have been previously made with respect to bobbins. It is of such rigidity and sturdiness that it has a comparatively long life. It presents a winding surface which is uniform throughout and which also precludes all possibility of the yarn wedging or becoming caught, thereby minimizing the danger unwound from the bobbin. The bobbin is also of such simple construction that it can be very easily produced and at such a low cost that the replacement of defective bobbins presents no serious economical problem.

Having described my invention what I claim and desire to secure by Letters Patent is:

1. A bobbin comprising a metallic core, a barrel of flbrous material surrounding the core, each end of said barrel being provided on its outer circumferential surface with a preformed tapered portion, metallic flanges each provided with an annular depression adapted to receive an opposite end of said barrel whereby outward upsetting of the barrel ends is avoided and means on said me- The yarn as wound tallic core to hold the flanges in abutting relationship with the barrel.

2. A bobbin comprising a metallic core, a barrel of flbrous material surrounding the core, each end of said barrel being provided on its outer circumferential surface with a preformed tapered portion, metallic flanges each provided with an annular depression adapted to receive an opposite end of said barrel whereby outward upsetting of the barrel ends is avoided, the ends of said metallic core being crimped over against the outer surface of each flange to hold the latter in close contact with the barrel ends.

3. A bobbin comprising a metallic core, a barrel of flbrous material surrounding the core, each end of said barrel being provided on its outer circumferential surface with a preformed tapered portion, metallic flanges each provided with an annular depression adapted to receive an end of said barrel and means to engage the tapered surface of the barrel at several spaced points whereby the surfaces of the barrel at these spaced points is not raised above the general level of the surface of the barrel and means on said metallic core to hold the flanges in abutting relationship with the barrel.

4. A bobbin comprising a metallic core, a barrel of fibrous material surrounding the core, each end of said barrel being provided on its outer circumferential surface with a preformed tapered portion, metallic flanges each provided with an annular depression adapted to receive an end of said barrel and means to engage the tapered surface of the barrel at several spaced points whereby the surfaces of the barrel at these spaced points is not raised above the general level of the surface of the barrel, the ends of said metallic core being crimped over against the outer surface of each flange to hold the latter in close contact with the barrel ends.

5. A bobbin comprising a metallic core, a barrel of fibrous material surrounding the core, each end of said barrel being provided on its outer circumferential surface with a preformed tapered portion, metallic flanges each provided with an annular depression adapted to receive an end of said barrel and a series of projections adapted to engage with and be embedded in the tapered surface of the barrel at several spaced points whereby the surfaces of the barrel at these spaced points is not raised above the general level of the surface of the barrel, the ends of said metallic core being crimped over against the outer surface of each flange to hold the latter in close contact with the barrel ends.

6. A bobbin comprising a metallic core, a barrel of fibrous material surrounding the core, each end of said barrel being provided on its outer circumferential surface with a preformed apered portion, metallic flanges each provided with an annular depression adapted to receive an end of said barrel and a series of projections adapted to engage with and be embedded in the tapered surface of the barrel at several spaced points whereby the surfaces of the barrel at these spaced points is not raised above the general level of the surface of the barrel, the ends of said metallic core 

